<!DOCTYPE html>
<html><head>
  <title>CSS Variables Allowed Syntax</title>
  <link href="http://dbaron.org/" rel="author" title="L. David Baron">
  <link href="http://mozilla.com/" rel="author" title="Mozilla Corporation">
  <link href="http://www.w3.org/TR/css-variables-1/#defining-variables" rel="help">
  <meta content='The <value> type used in the syntax above is defined as anything matching the "value" production in CSS 2.1 Chapter 4.1 [CSS21].' name="assert">
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>
<script id="metadata_cache">/*
{
  "percentage": { "assert": "Value allowed within variable: percentage" },
  "number": { "assert": "Value allowed within variable: number" },
  "length": { "assert": "Value allowed within variable: length" },
  "time": { "assert": "Value allowed within variable: time" },
  "function": { "assert": "Value allowed within variable: function" },
  "nested_function": { "assert": "Value allowed within variable: nested function" },
  "parentheses": { "assert": "Value allowed within variable: parentheses" },
  "braces": { "assert": "Value allowed within variable: braces" },
  "brackets": { "assert": "Value allowed within variable: brackets" },
  "at_keyword_unknown": { "assert": "Value allowed within variable: at-keyword (unknown)" },
  "at_keyword_known": { "assert": "Value allowed within variable: at-keyword (known)" },
  "at_keyword_unknown_and_block": { "assert": "Value allowed within variable: at-keyword (unknown) and block" },
  "at_keyword_known_and_block": { "assert": "Value allowed within variable: at-keyword (known) and block" },
  "unbalanced_close_bracket_at_toplevel": { "assert": "Value not allowed within variable: unbalanced close bracket at toplevel" },
  "unbalanced_close_paren_at_toplevel": { "assert": "Value not allowed within variable: unbalanced close paren at toplevel" },
  "unbalanced_close_bracket_in_something_balanced": { "assert": "Value not allowed within variable: unbalanced close bracket in something balanced" },
  "unbalanced_close_paren_in_something_balanced": { "assert": "Value not allowed within variable: unbalanced close paren in something balanced" },
  "unbalanced_close_brace_in_something_balanced": { "assert": "Value not allowed within variable: unbalanced close brace in something balanced" },
  "CDO_at_top_level": { "assert": "Value allowed within variable: CDO at top level" },
  "CDC_at_top_level": { "assert": "Value allowed within variable: CDC at top level" },
  "semicolon_not_at_top_level_value_unused": { "assert": "Value allowed within variable: semicolon not at top level (value -> unused)" },
  "CDO_not_at_top_level_value_unused": { "assert": "Value allowed within variable: CDO not at top level (value -> unused)" },
  "CDC_not_at_top_level_value_unused": { "assert": "Value allowed within variable: CDC not at top level (value -> unused)" }
}
*/</script>
</head>
<body onload="run()">
<div id="log"></div>
<div id="test"></div>
<script>
setup({ "explicit_done": true });

function run() {
  // Setup the iframe
  var div = document.getElementById("test");
  var test_cs = window.getComputedStyle(div, "");

  var initial_cs = test_cs.backgroundColor;
  div.setAttribute("style", "background-color: green");
  var green_cs = test_cs.backgroundColor;
  div.setAttribute("style", "background-color: red");
  var red_cs = test_cs.backgroundColor;

  function description_to_name(description) {
    return description.replace(/\W+/g, "_").replace(/^_/, "").replace(/_$/, "");
  }

  function assert_allowed_variable_value(value, description) {
    test(function() {
           div.setAttribute("style",
                            "  --test: red;\n" +
                            "  --test: " + value + ";\n" +
                            "  background-color: red;\n" +
                            "  background-color: var(--test);\n" +
                            "");
           assert_not_equals(initial_cs, red_cs);
           assert_equals(initial_cs, test_cs.backgroundColor);
         },
         description_to_name(description),
         { assert: "Value allowed within variable: " + description });
  }

  function assert_disallowed_balanced_variable_value(value, description) {
    test(function() {
           div.setAttribute("style",
                            "  --test: green;\n" +
                            "  --test: " + value + ";\n" +
                            "  background-color: red;\n" +
                            "  background-color: var(--test);\n" +
                            "");
           assert_not_equals(green_cs, red_cs);
           assert_equals(green_cs, test_cs.backgroundColor);
         },
         description_to_name(description),
         { assert: "Value not allowed within variable: " + description });
  }

  assert_allowed_variable_value("25%", "percentage");
  assert_allowed_variable_value("37", "number");
  assert_allowed_variable_value("12em", "length");
  assert_allowed_variable_value("75ms", "time");
  assert_allowed_variable_value("foo()", "function");
  assert_allowed_variable_value("foo(bar())", "nested function");
  assert_allowed_variable_value("( )", "parentheses");
  assert_allowed_variable_value("{ }", "braces");
  assert_allowed_variable_value("[ ]", "brackets");
  assert_allowed_variable_value("@foobar", "at-keyword (unknown)");
  assert_allowed_variable_value("@media", "at-keyword (known)");
  assert_allowed_variable_value("@foobar {}", "at-keyword (unknown) and block");
  assert_allowed_variable_value("@media {}", "at-keyword (known) and block");
  assert_disallowed_balanced_variable_value("]", "unbalanced close bracket at toplevel");
  assert_disallowed_balanced_variable_value(")", "unbalanced close paren at toplevel");
  assert_disallowed_balanced_variable_value("(])", "unbalanced close bracket in something balanced");
  assert_disallowed_balanced_variable_value("[)]", "unbalanced close paren in something balanced");
  assert_disallowed_balanced_variable_value("(})", "unbalanced close brace in something balanced");
  assert_allowed_variable_value("<!--", "CDO at top level");
  assert_allowed_variable_value("-->", "CDC at top level");
  assert_allowed_variable_value("(;)", "semicolon not at top level (value -> unused)");
  assert_allowed_variable_value("(<!--)", "CDO not at top level (value -> unused)");
  assert_allowed_variable_value("(-->)", "CDC not at top level (value -> unused)");

  done();
}

</script>


</body></html>
